Crystal connection or External reference clock input.
Crystal connection. If using an external reference, this pin should be left open.
Spread Spectrum ON/OFF. Spread Spectrum function enabled when HIGH, disabled
when LOW. Has an internal pull-up resistor inside.
Ground.
Modulated clock output.
Modulation Rate Select. When LOW selects Low Modulation Rate. Selects High
Modulation Rate when pulled HIGH. Has an internal pull-up resistor inside.
Analog Deviation Selection through external resistor to GND.
2.5V/3.3V supply Voltage.
Frequency Selection table
VDD (V)
2.5
3.3
Frequency (MHz)
15-40
15-50
Operating Conditions
Parameter
VDD
T
A
C
L
C
IN
Supply Voltage
Operating Temperature
Load Capacitance
Input Capacitance
Commercial
Industrial
Description
Min
2.3
0
-40
Max
3.6
+70
+85
10
7
Unit
V
°C
pF
pF
Rev. 1 | Page 2 of 11 | www.onsemi.com
PCS3P8504A
Absolute Maximum Rating
Symbol
VDD, V
IN
T
STG
T
s
T
J
T
DV
Storage temperature
Max. Soldering Temperature (10 sec)
Junction Temperature
Static Discharge Voltage (As per JEDEC STD22- A114-B)
Parameter
Rating
-0.5 to +4.6
-65 to +125
260
150
2
Unit
V
°C
°C
°C
KV
Voltage on any input pin with respect to Ground
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect
device reliability.
DC Electrical Characteristics for 2.5V
Parameter
VDD
V
IL
V
IH
I
IL
I
IH
V
OL
V
OH
I
CC
I
DD
Z
o
Description
Supply Voltage
Input LOW Voltage
Input HIGH Voltage
Input LOW Current
Input HIGH Current
Output LOW Voltage
Output HIGH Voltage
Static Supply Current
Dynamic Supply Current
Output Impedance
V
IN
= 0V
V
IN
= V
DD
I
OL
= 8mA
I
OH
= -8mA
Test Conditions
Min
2.3
Typ
2.5
Max
2.7
0.7
Unit
V
V
V
1.7
25
25
0.6
1.8
50
14
35
µA
µA
V
V
µA
mA
XIN / CLKIN pulled low
Unloaded Output
Switching Characteristics for 2.5V
Parameter
Input Frequency / ModoUT
Duty Cycle
2, 3
2, 3
1
Test Conditions
Measured at V
DD
/2
Measured between 20% to 80%
Measured between 80% to 20%
Min
15
45
Typ
50
Max
40
55
2.2
2
Unit
MHz
%
nS
nS
pS
Output Rise Time
Output Fall Time
2, 3
3
Cycle-to-Cycle Jitter
PLL Lock Time
Notes:
3
Unloaded output with SSEXTR OPEN @ 27MHz
Stable power supply, valid clock presented on XIN /
CLKIN
±175
3
mS
1. Functionality with Crystal is guaranteed by design and characterization. Not 100% tested in production.
2. All parameters are specified with 10pF loaded outputs.
3. Parameter is guaranteed by design and characterization. Not 100% tested in production.
Rev. 1 | Page 3 of 11 | www.onsemi.com
PCS3P8504A
DC Electrical Characteristics for 3.3V
Parameter
VDD
V
IL
V
IH
I
IL
I
IH
V
OL
V
OH
I
CC
I
DD
Z
o
Description
Supply Voltage
Input LOW Voltage
Input HIGH Voltage
Input LOW Current
Input HIGH Current
Output LOW Voltage
Output HIGH Voltage
Static Supply Current
Dynamic Supply Current
Output Impedance
V
IN
= 0V
Test Conditions
Min
3.0
Typ
3.3
Max
3.6
0.8
Unit
V
V
V
2.0
25
25
0.4
2.4
50
20
30
µA
µA
V
V
µA
mA
V
IN
= V
DD
I
OL
= 8mA
I
OH
= -8mA
XIN / CLKIN pulled low
Unloaded Output
Switching Characteristics for 3.3V
Parameter
Input Frequency / ModOUT
Duty Cycle
2, 3
2, 3
1
Test Conditions
Measured at V
DD
/2
Measured between 20% to 80%
Measured between 80% to 20%
Min
15
45
Typ
50
Max
50
55
1.8
1.6
Unit
MHz
%
nS
nS
pS
Output Rise Time
Output Fall Time
2, 3
3
Cycle-to-Cycle Jitter
PLL Lock Time
Notes:
3
Unloaded output with SSEXTR OPEN @ 27MHz
Stable power supply, valid clock presented on XIN /
CLKIN
±150
3
mS
1. Functionality with Crystal is guaranteed by design and characterization. Not 100% tested in production.
2. All parameters are specified with10pF loaded outputs.
3. Parameter is guaranteed by design and characterization. Not 100% tested in production.
Rev. 1 | Page 4 of 11 | www.onsemi.com
PCS3P8504A
Typical Crystal Specifications
Fundamental AT cut parallel resonant crystal
Nominal frequency
Frequency tolerance
Operating temperature range
Storage temperature
Load capacitance(C
P
)
Shunt capacitance
ESR
27MHz
±50 ppm or better at 25°C
-25°C to +85°C
-40°C to +85°C
18pF
7pF maximum
25
Note: C
L
is the Load Capacitance and Rx is used to prevent oscillations at overtone frequency of the Fundamental frequency.
Typical Crystal Interface Circuit
PCS3P8504A
R
XIN / CLKIN
XOUT
Crystal
Rx
C
L
C
L
C
L
= 2*(C
P
– C
S
),
Where C
P
= Load capacitance of crystal from crystal vendor datasheet.
